Apparatus for drawing hollow glass cylinders.



M. J. HBALY. APPARATUS FOR DRAWING` HOLLOW GLASS GYLINDERS. APPLIOATIDNFILED HAR.11, 1909.

' Patented N0v.14,1911.

2 SHEETS- SHEET 1.

IN VEN T 0R am l@ Y.

Allvonv y J. H BALY. APPARATUS FOR DRAWING HOLLOW GLASS GYLINDERS.

. APPLICATION FILED IAR, 11, 1909 Patente 1d Nov. 14, 1911.

W/TNEssEs A llornej 50 resting against wedges-9 supported by `a MACKJ.HEALY, Fh IIBADFORD, PNNSYLVANIA.

APPARATUS FOB DRAWING' HOLLOW GLASS CYLINDERS.

Specication 'of Letters Patent.

Patented Nov. 14,1911.

Application filed lla-rch 11, 1909. `Serial No. 482,758.

To all whom 'it may concern:

Be it known that I, MACK J. HEALY, of Bradford, in the county of McKeanand State ofvPennsylvania, have invented certain 5 new andnsefulImprovements in Apparatus for Drawing Hollow Glass Cylinders; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, "such as will enable others skilled in the art in towhich it appertains to make and use the same. 4

My invention relates to apparatus for drawing hollow glass cylinders,and is designed to provide for chilling the metal at or near the drawingpoint, thereby enabling metto draw cylinders of even and uniformthickness throughout and comparatively free from impurities and defects.f

With these and other ends in view my invention consists in the parts andcombination of parts as will be more fully explained and pointed out inthe claims.

In the accompanying drawings, Figure I is a view in plan partly insection of a glass melting tank; Fig. 2 is a view in section through theworking end of same, and Fig. 3 is a view in sectioniof the top Vring orshield and the floating ring and the table.

l represents the glass melting tank of 3o ordinary construction, the capor crown 2 ocf'whichv is provided with a series of drawing openin s 3located adjacent to its edge. Located within the tank isthepa'rtition or-baflle wall 4 parallel with the outer wall'of the tank, and providedwith: av series of f arched openings 5. which. latter are locatedintermedlate the drawing o ningsethixs leaving a pier or wall 6 ixnmeiately each drawingopenin p' Y.

Located within ytie tank immediately under each drawing opening 3, is atable or hind shield 7 made of refractory material of less` specificgravity than the molten metal so t at the tendency of the table @will beto i float. These-tables are located inf the vertiba plane of thedrawing openings in the tank, ,and are held submerged in the molten masswithin' the tank by any, preferred means. I have shown the tables orshiellds t e shoulders 8 the under face of which tter are made ofrefractory material set into the outer wall and piers 6 of the tank, butany other means -for holding them submrged may be employed; and' ifdesired the tables or shields may rest directly against the shoulders.With this latter construction the table will Aautomatically maintain itsposition a predetermined distaiice below thei level of the fluid,irrespective of changes in the depth of the fluid in the tank.

There should always be a free mass of the molten met-al above the tables or shields, hence if the level of the mass be lowered for anyreason or from any causnthe tables or shields may also be lowered oyintroducing| more refractory wedges between the top of the tables orshields and the shoulders 8. These tables are larger in diameter thanthe diameter of the floating rings to be hereinafter referred to, sothat when inoperative position, theyhypermit the free and unrestrictedmovement of the melted glass overl the table,"J but shield the cylinderbeing drawn 'fromthe intense heat of the mass f molten metal below thetable. By this ar-v rangement the cylinder is only exposed from below,to the mass of metal :.bove the table or shield and is protected at itssides bythe floating ring 11 and alsofby she ring shield 12 both ofwhich are shown in Fig. 3. The Y floating rings 11 are of the ordinaryconstruction and material, and float on the metal in a -plane above theta bleef?, and are drawn into place by hooked rods` operatedthroughholes in the tank. After acylinder has been drawn, the floatingring 11' with the cooled glass adhering-,to and remaining in the same,is pushed from uider the drawing opening through one of tl. e archedopenings into the body of the tank, 'where the intense heat remelts theglass thereinV and puts the ring in condition for another drawlng., Ayseriesof floating rings,v usually about three, are provided for eachdrawing opening, hence-after using one, another is ready for use withouttheloss of anv time 4other than that necessary in placing. it inposition.

The floating ring is of less diameter than the table, and it isycentered and held in position immediately overthe ltable by the ringshield 12. This shield 12 is of af size to embrace" the floating ringand prevent the latte'r from lateral movement when 'the parte areassembled, and is provided at the sides' with two, preferably V-shapedhails 13 each of which' 1s connected at its uppr end -to a ro or cable14 passing over pu eys 15, the ca les being provided at their lower endwith a. counterbalan 16. ,By raising or lowering the two counterweightsthe shield v ring will be raised or lowered to release or embrace thefloating ring. By this arrangement the entire space immediately over thedrawing opening is left free for unrestricted.

metal above the table and not from the mass below the latter, and whenthe rings are in place, the cylinder is shielded and protected from theradiated heat at the sides.

By my improvement, I obtain all the advantages incidental to drawingfrom a pot, without the loss of time and expense of ladling and as thecylinder is drawn directly from the tank, the operation may b econtinuous.

It is evident that many slight changes might be resorted to in therelatlve arrangement of parts shown and described without departing fromthe spirit and 'scope of my invention hence I would have it understoodthat I do not wish to confine myself to the exact construction andarrangement of parts shown, but,

Having fully described my invention what I claim as new and desiretosecure by Letters-Patent, is

l. In glass drawing apparatus, the combination with a tank having adrawing open ing through its crown or ca plate, of a table or shieldwithin the tang beneath the drawingopening, below the working level ofthe melted lass and above the bottom of the tank, ang a verticallymovable ring shield adapted to pass through said drawing opening andsupported independently of the ca or crown.

2. In g ass drawing apparatus, the combination with a tank havmg adrawing open? ing through its crown or cap plate, and a oounterbalancedring shield supported for vertical adjustment independently of the crownplateof the tank and within the drawing opening in the latter, offasubmerged table or shield beneath said ring shield and above thebottomof the-tank.

3. In glass drawing apparatus the combination of a tank having a drawingopening through its crown r cap plate, a floating ring, and acounterbalanced ring shield supported independently of the crown or capplate, and adapted to embrace the float-- ing ring and hold same inposition beneath the drawing opening.

4. In glass drawin alpparatus, the combination with a tan `aving adrawing opening through its crown or cap plate, a fioating ring, and avertically movable counterbalanoed ring shield supported independentlyof the crown or cap plate, and

adapted to embrace the floating ring andl hold same in position beneaththe drawing opening, of a table or shield located beneath the drawinopening and submerged below the `level ci; the molten glass.

5. In a glass drawing apparatus, the combination with a tank having adrawing opening, a pier in said tank at the rear of the drawing opening,and a table or shield located in the vertical plane of the drawingopening, below the 'levelof the molten glass but-above the ioor of thetank, and extending from the pier to the outer or breast wall of thetank, of a oating ring in the tank, a counterbalanced ring shield ofless diameter than the drawing opening and of greater diameter than thefloating ring, and suspension means for the ring shield.

In testimony whereof, I have signed this specification in the presence.of two subscribing Witnesses.

MACK J. HEALY. Witnesses:

A. N. MITCHELL, GEO. F. DOWNING.

Copies of this patent may be obtained for tive'cents each, by addressingthe Commissioner of Patents.

Washingtom D. C.

